Unlock Hidden Messages in Images with MATLAB: A Beginner’s Guide to Steganography 🔍

The goal of the project is to construct an introductory tutorial on the subject of steganography, mainly focused on embedding data in digital images. Steganography is a Greek word which means camouflaged piece. The word stegano infers verified and graphical infers forming. Appropriately, steganography isn’t only the specialty of hiding data yet furthermore disguising the truth of transmission of secret data.

Code:
clc
clear all
close all
warning off
a=imread('testimage.png');
subplot(2,2,1);
imshow(a);
title('Carrier Image');
x=imread('SECRET.jpg');
subplot(2,2,2);
imshow(x);
title('Secret Image');
[r c g]=size(a);
x=imresize(x,[r c]);
ra=a(:,:,1);
ga=a(:,:,2);
ba=a(:,:,3);
rx=x(:,:,1);
gx=x(:,:,2);
bx=x(:,:,3);
for i=1:r
for j=1:c
nc(i,j)= bitand(ra(i,j),254);
ns(i,j)= bitand(rx(i,j),128);
ds(i,j)=ns(i,j)/128;
fr(i,j)=nc(i,j)+ds(i,j);
end
end
redsteg=fr;
for i=1:r
for j=1:c
nc(i,j)= bitand(ga(i,j),254);
ns(i,j)= bitand(gx(i,j),128);
ds(i,j)=ns(i,j)/128;
fr(i,j)=nc(i,j)+ds(i,j);
end
end
greensteg=fr;
for i=1:r
for j=1:c
nc(i,j)= bitand(ba(i,j),254);
ns(i,j)= bitand(bx(i,j),128);
ds(i,j)=ns(i,j)/128;
fr(i,j)=nc(i,j)+ds(i,j);
end
end
bluesteg=fr;
finalsteg=cat(3,redsteg,greensteg,bluesteg);
redstegr=finalsteg(:,:,1);
greenstegr=finalsteg(:,:,2);
bluestegr=finalsteg(:,:,3);
subplot(2,2,3);
imshow(finalsteg);
title('Stegmented Image');
for i=1:r
for j=1:c
nc(i,j)=bitand(redstegr(i,j),1);
ms(i,j)=nc(i,j)*128;
end
end
recoveredr=ms;
for i=1:r
for j=1:c
nc(i,j)=bitand(greenstegr(i,j),1);
ms(i,j)=nc(i,j)*128;
end
end
recoveredg=ms;
for i=1:r
for j=1:c
nc(i,j)=bitand(bluestegr(i,j),1);
ms(i,j)=nc(i,j)*128;
end
end
recoveredb=ms;
output=cat(3,recoveredr,recoveredg,recoveredb);
subplot(2,2,4);
imshow(output);
title('Recovered Image');

MATLAB Image processing based project.

MATLAB project for Engineering Students.

MATLAB Based software project

Image Steganography and Cryptography.

M.tech Projects Based on MATLAB.

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